Rod mill with material recirculation means



Oct. 28, 1947.v K. 2. HUSZAR RODMILL WITH MATERIAL RECIRCULATION MEANS Original Filed Dec. 29, 1941 v gwue/wto'v KZHuSzaf Patented Oct. 28, 1947 OFFICE ROD MILL WITH MATERIAL RECIRCU- LATION MEANS Kalman Z. Huszar, Cincinnati, Ohio Original application December 29, 1941, Serial No.

424,839. Divided and this application November 13, 1944, Serial No. 563,242

3 Claims.

This invention relates to a rodmill for crushing, pulverizing or mixing materials, such as dye, face powder, or the like, and is a diversion of my co-pending application, Serial No. 424,839, filed December 29, 1941, for .Rodmill, now Patent Number 2,367,585, dated January 16, 1945.

An object of this invention is to provide an improved comminuting or crushing mill including means at one end of the mill whereby the ground material is discharged from the mill into a mixing means rotatable with the mill, so that the already ground material may be initially withdrawn from the mill, and subsequently returned thereto during th rotation of the mill.

Another object of this invention is to provide in a pulverizing or grinding mill an improved means whereby the ground material is taken from the mill at one end thereof and returned to the center of the mill, so that the ground material will mix with the material in the mill.

A further object of this invention is to provide in a pulverizing mill an improved means whereby the ground material may be returned to the mill in such a manner that th force of the return of the material to the niill will act as a mixing means for mixing the ground material with the material which is being ground within the mill.

To the foregoing objects and others which may hereinafter appear, the invention consists of the novel construction, combination and arrangement of parts as will be more specifically referred to and illustrated in the accompanying drawings, but it is to be understood that changes, variations and modifications may be resorted to which fall within the scope of the invention as claimed.

In the drawing;

Figure 1 shows ,a side elevation partly in longitudinal section of a' pulverizing mill constructed according to an embodiment of this invention.

Figure 2 is an end elevation of this rodmill.

Referring to the drawing, the numeral It designates generally a pulverizing mill member which is rotatably supported on a base structure ii. The mill member l9 includes a cylindrical body l2 containing a number of pulverizing units or bars E3. The cylindrical body I2 is formed with an opening M through which the material is charged for filling the mill. The closure member 55 is adapted to be removably secured to the cylindrical wall l2 for closing the filling opening i i.

A forward end wall 16 is secured to one end of the cylindrical body [2 and a rear end wall I1 is secured to the opposite end of the cylindrical wall l2. A trunnion I3 is secured to the end wall [6 and is rotatably supported in a bearing l9 carried by an upstanding bearing support 29 which is fixed to the base H and braced by means of one or more bracing members 2 l. The cylindrical body l2 adjacent the end wall ll thereof has secured to the outer peripheral surface thereof a circular track or rail 22, which engages a pair of spaced apart rollers 23 carried by bearing members 24 which are fixed to the base l I.

A ring gear 25 is fixed to the outer side of the end wall I6 and is adapted to mesh with a driving pinion 26 carried by a shaft 21. The shaft 21 is connected to a reduction gearing 28 of conventional construction which has connected therewith a driving wheel 29. The driving wheel 29 may be operated in any suitable manner from a power memberinot shown). I

The end wall I! has secured thereto a pair of diametrically opposed and outwardly extending or offset housings 30 and 3l. The housing 30 is formed of an outer end wall 32 and opposite side walls 33, thereby forming a pulverized material receiving chamber 34. The outer end of the housing 39 has an outer end wall 35 which'is connected with the walls 33 and with the wall 32, and is outwardly offset from the outer marginal edge of the end wall ll. An inwardly extending wall 36 is connected at one end to the forward end of the outer wall 35, and at the other end is fixed to the peripheral surface of the cylindrical body I2 forwardly of the end 'wall ll.

The cylindrical wall or body I2 is formed with an'opening 31 communicating with the passage 38 formed by the wall 36, so that when the housing 30 is in a lowermost-position, the pulverized material will flow downwardly through the opening 3'! and the passage 38 into the lower portion of the housing 30. The inner portion of the housing 39 is connected to the inner portion of the housing 3! by means of an annular connecting wall 39 which, as shown in Figure 1, is inwardly oiiset from the outer walls of the two housings 3i) and 3|.

The housing 3| is similar in every detail to the construction of the housing 39, the cylindrical wall l2 being formed with a discharge opening 49 adjacent the end wall I! which communicates with the chamber 4| through a passage 42 similar to the passage 38.

When it is desired to return the initially pulverized material from the end housings 33 and 3! to the interior mill, the structure shown in the drawing is adapted to be mounted in the housings 3i! and 3! and in the opening 45. The material from the uppermost one of the housings 39 or 3! is guided back to the mill Ill by means of a conical guide member generally designated as I24. The guide member I24 includes a conical body I25 which has fixed axially thereof a tubular sleeve I26. The sleeve I26 engages about a rearwardly extending stub shaft I21 which is secured to a supporting bar I28 removably mounted in opening 45 of end wall II being friction tight in opening 45.

The bar I28 is provided with a cylindrical bearing I29, and a pin or fastening device I30 engages through the bearing I29 and through the inner end portion of the shaft I2'I. A nut or fastening member I3I is mounted on the outer end of the shaft I21 and bears against the sleeve I26, so as to tightly hold the guide member I24 in the opening I32 formed between the housings 30 and 3|. A cylindrical base I 33 is fixed to the base or outer end of the conical guide member I25 and an annular flange I34 is fixed to the cylindrical base I33 intermediate the ends thereof and bears against the outer side of the annular connecting member 39 which connects the two housings 3i] and 3I together.

A plurality of radially disposed and inwardly extending bracing webs I35 are fixed to the inner side of the annular base I33 and to the outer end portion of the sleeve I26. The bar I28 at the opposite end portions thereof is formed with cutouts or notches I36 which form seats for the outer end portions of the bar I28, so as to hold this'bar I28 radially of the opening 45 and permit the bar I28 to be removed from the housing Ill.

The force of the inwardly moving initially pul verized material is sufficient to cause this material to commingle to a thorough degree with the material within the mill I 0. While I have shown two radially disposed housings or guide members designated 30 and 3|, it will be understood that there may be one, two, or more of these guide members or housings, so as to effect the discharg tubular member on said stub shaft and an anof a greater amount of material from these housings back to the mill.

What I claim is:

1. In combination a pulverizing mill including a rotatable body formed with a cylindrical side Wall and opposite end walls, a pair of radially disposed housings carried by one of said end walls, each housing comprising a rear wall and opposite side walls fixed to said one end wall, said cylindrical wall having opposed openings, passage forming means fixed to said housings and extending outwardly therefrom, said pass-age forming means communicating with said housings and encompassing said openings, means forming an annular valve seat between the adjacent ends of said rear walls, said one end wall having an axial opening, a conical guide member engaging benular flange carried by said cylindrical base and engaging against the outer side of said valve seat, said guide member directing the material from an uppermost housing inwardly through said axial opening whereby to return the material to said rotatable body.

2. In combination, a, pulverizing mill including a rotatable body formed with a cylindrical side wall and opposite end walls, a pair of radially disposed housings carried by one of said end walls, means communicating the outer ends of said housings with said body, said one end wall having an axial opening, and means returning the pulverized material from said housings to the center of said body, said means including a conical member carried at its large end by said housings, a supporting bar extending across said wall opening and means carried axially by said conical member engaging said bar for supporting the inner small end of said conical member.

3. In combination, a pulverizing mill including a rotatable body formed with a cylindrical side wall and opposite end walls, a pair of radially disposed housings carried by one of said end walls, means communicating said housings with said body, said body having an axial opening in said one end wall, a conical member supported between the inner ends of said housings and disposed with the apex thereof confronting said opening, a bar extending across said axial opening and means extending from the apex of said conical member engaging said bar for supporting said apex coaxial with said axial opening, said conical member providing means for returning the material to the center of said body.

KALMAN z. I-IUSZAR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,252,520 Petersen Aug. 12, 1941 1,753,685 Bodenstein Apr. 8, 1930 2,259,769 Newhouse Oct. 21, 1941 726,521 Ferraris Apr. 28, 1903 2,079,221 Nuller May 4, 1937 1,113,120 Howard Oct. 6, 1914 

